Help with testing a sequence of two commands using PHPUnit and ReactPHP

[programarivm]

👋 Hi there,

At ChesslaBlab we're using PHPUnit along with React\Socket\Connector to write functional tests for the PHP Chess Server.

The following example shows how a sequence of one command can be tested successfully.

    // ...

    /**
     * @test
     */
    public function start_classical_fen()
    {
        self::$connector->connect("$this->host:$this->port")->then(function (ConnectionInterface $conn) {
            $conn->on('data', function ($data) use ($conn) {
                self::$deferred->resolve($data);
                $conn->close();
            });
            $conn->write("/start classical fen");
        });

        $response = \React\Async\await(self::$promise->then(function (string $result): string {
            return $result;
        }));

        $expected = '{"\/start":{"variant":"classical","mode":"fen","fen":"rnbqkbnr\/pppppppp\/8\/8\/8\/8\/PPPPPPPP\/RNBQKBNR w KQkq -"}}';

        $this->assertEquals($expected, $response);
    }

    // ...
}

However, it seems as if we're wissing something when testing a sequence of two commands.

/start classical fen
/legal e2

In this case, the expected response should be the following.

$expected = '{"\/legal":{"color":"w","id":"P","fen":{"e3":"rnbqkbnr\/pppppppp\/8\/8\/8\/4P3\/PPPP1PPP\/RNBQKBNR b KQkq -","e4":"rnbqkbnr\/pppppppp\/8\/8\/4P3\/8\/PPPP1PPP\/RNBQKBNR b KQkq e3"}}}';

See:

• Write a functional test to check the /legal command chesslablab/chess-server#190

I haven't been able to find an example of how to test a sequence of two commands using PHPUnit and ReactPHP.

Any help would be greatly appreciated, thank you!

[kaifkh20]

I think presently there is now way to do this I think.

But I have found an another way that reuse the same function from the StartCommandTest class. Would you like to see it??

[programarivm]

See https://github.com/orgs/chesslablab/discussions/381

[WyriHaximus]

I'm somewhat confused about why the two commands would fail. Showed code should handle that fine?

You could rewrite:

        $response = \React\Async\await(self::$promise->then(function (string $result): string {
            return $result;
        }));

As:

        $response = \React\Async\await(self::$promise);

[kaifkh20]

I don't think that would work since conn does not let us write two functions at a time.
I think the problem is when we write the commands in conn->write function it only let us write only once.

[WyriHaximus]

conn->write lets you write anything you want. It's a raw TCP stream so you'd have to build or implement a protocol on top of that to handle commands.

[programarivm]

Thank you @WyriHaximus for the help.

Not too sure about this one yet. No worries, I suppose for the time being the Selenium automated tests will be kind of equivalent to the so-called functional tests.